ultramafic rock
91Slave craton — which is one of the oldest dated rock units on Earth at 4.03 Ga. The crust of the Slave craton is thought to have amalgamated during a 2.69 Ga collision between a proto Slave western basement complex, known as the Central Slave Basement Complex,… …
92Pilbara craton — The Pilbara craton (the Pilbara province in northwest Western Australia), along with the Kaapvaal craton (the Kaapvaal province of South Africa) are the only remaining areas of pristine Archaean 3.6 2.7 Ga crust on Earth. Similarities of their… …
93Lateritic nickel ore deposits — are surficial, weathered rinds formed on ultramafic rocks.They comprise 73% of the continental world nickel resources and will be in the future the dominant source for the winning of nickel. Genesis and types of nickel laterites Lateritic nickel… …
94Volcano — This article is about the geological feature. For other uses, see Volcano (disambiguation) …
95Serpentine group — The serpentine group describes a group of common rock forming hydrous magnesium iron phyllosilicate ((magnesium, iron)3silicon|2oxygen|5hydroxide|4) minerals; they may contain minor amounts of other elements including chromium, manganese, cobalt… …
96Gabbro — (pronEng|ˈɡæbrəʊ) is a dark, coarse grained, intrusive igneous rock chemically equivalent to basalt. It is a plutonic rock, formed when molten magma is trapped beneath the Earth s surface and cools into a crystalline mass. The vast majority of… …
97Talc — magnesium silicate redirects here. For the synthetic form, see synthetic magnesium silicate. Talc Three pieces of Talc. General Category Silicate mineral …
98Norite — is a mafic intrusive igneous rock composed largely of the calcium rich plagioclase labradorite and hypersthene with olivine. Norite is essentially indistinguishable from gabbro without thin section study under the petrographic microscope. It… …
99Bushveld Igneous Complex — The Bushveld Igneous Complex (or BIC) is a large igneous intrusion within the Earth s crust which has been tilted and eroded and now outcrops around what appears to be the edge of a great geological basin. Located in South Africa, the BIC… …
100Chromite — General Category Oxide minerals Chemical formula (Fe, Mg)Cr2O4 …
